Test online for seamans about Engine department, Operational level, Steam (CES v6.0)
Результаты прохождения теста
Тест состоял из 80 случайных вопросов.
Всего вопросов по данной теме: 81
Всего вопросов по данной теме: 81
Ваш результат: 86%
Правильные ответы:
1
When using portable ladders during work activities onboard a ship what precautions should be taken?
Ваш ответ правильный:
Secure the ladder top and bottom and have a shipmate standing by while you are working on the ladder.2
Under what circumstances would you remove guards and safety devices from machinery?
Ваш ответ правильный:
During overhaul and maintenance procedures.3
When having a fire alarm during normal working hours, what immediate actions should be taken?
Ваш ответ правильный:
Act according to instruction given in the fire plan.4
Select the one option which correctly completes the following statement: A portable ladder ____.
Ваш ответ правильный:
Should be secured before working from it.5
Which of the following instruments is normally part of a control-loop?
Ваш ответ правильный:
Transducer.6
In accordance with SOLAS and other international regulations, certain important machinery functions, such as operation and control of the steering gear and propulsion machinery, must be tested at specified times. When should these tests be carried out?
Ваш ответ правильный:
Prior to arrival and departure from port and following maintenance.7
What is the minimum working pressure of the international shore connection?
Ваш ответ правильный:
1 N/mm2.8
On finding a person apparently unconscious in a High Voltage switch room, which of the following should be done?
Ваш ответ правильный:
Raise alarm, identify means of isolation and apply before approaching victim.9
Vibration analysis is often used as a conditioning monitoring tool onboard ship as part of the approved planned maintenance system. Many vibration measuring instruments are fitted with a harmonic filter/analyser. How would these filters normally be used during vibration measurement on a centrifugal pump?
Ваш ответ правильный:
To isolate a single frequency of vibration associated with one of the pumps components.10
Why shall a duly qualified officer supervise any potential polluting operation?
Ваш ответ правильный:
To avoid pollution.11
The bilge holding tank level is being reduced by discharging through the OWS. What action should be taken when the oil/water interface in the holding tank is reached?
Ваш ответ правильный:
Stop the OWS and pump the oil to the incinerator tank.12
During “dry lay up” of a main water tube boiler it is necessary to maintain dry, low humidity environment in the water spaces. Which of the chemicals given in the options would best achieve this condition?
Ваш ответ правильный:
Silica gel.13
An accumulation test may be necessary for a steam boiler following repairs or modifications. Which of the given options does the accumulation test check?
Ваш ответ правильный:
The capacity of the safety valve to relieve pressure.14
With reference to using centrifuges for cleaning fuel and lubricating oil what is the difference between a purifier and a clarifier.
Ваш ответ правильный:
In a clarifier only solids are removed from the oil, whereas in a purifier both solids and water are removed from the oil.15
How do we recognize a leaking fuel injection valve during testing?
Ваш ответ правильный:
The pressure falls off on the pressure gauge when trying to hold the pressure in the injector below normal opening set pressure.16
During regular inspection of alternator windings it is found that windings are always covered with a heavy oil film coming from the atmosphere surrounding the auxiliary engine. After cleaning with an approved solvent, what should be done?
Ваш ответ правильный:
Improve material of intake air filters.17
As part of a survey of a main steam boiler it is necessary to check the condition of the steam drum. What would be the preferred method for checking drum shell thickness in such a situation?
Ваш ответ правильный:
Use ultrasound equipment.18
What is the minimum number of portable fire extinguishers that must be carried on ships of 1 000 GRT and above?
Ваш ответ правильный:
5.19
What is the recommended range for the pH-value for the water in a diesel engine cooling system engine cooling water be maintained?
Ваш ответ правильный:
Between 7 and 10.20
What would the First Engineer require?
Ваш ответ правильный:
The First Engineer would require an inspection of the heating coils.21
A large electric motor is being removed from a main seawater pump with the aid of the engine room crane. Which is the best method of starting the lift from the options given?
Правильный ответ:
Use a suitable chain block suspended from the crane hook to “break” the motor free after slackening all of the retaining bolts.Ваш ответ:
Use the “inch up” facility on the crane to “break” the motor free after slackening all of the retaining bolts.22
The recognised definition of High Voltage equipment is anything that operates at over which of the following levels?
Ваш ответ правильный:
1 000 Volts AC or 1 500 Volts DC.23
What do you understand by the initials EPIRB?
Ваш ответ правильный:
Emergency Position Indicating Radio Beacon.24
What is meant by the term “two stage air compressor”?
Ваш ответ правильный:
A compressor in which the compressed air from the first stage is further compressed in the second stage before being delivered to the air receiver.25
The insulation resistance (IR) to earth of a new galley hot-plate is measured to be 30 Mohm. When three identical hot-plates are tested together their combined IR will be:
Ваш ответ правильный:
10 Mohm.26
Which diagram is the symbol for a THYRISTOR?
Ваш ответ правильный:
Figure 2.27
When handling drugs:
Ваш ответ правильный:
Wear skin protection.28
Which of the options given is one of the main responsibilities of a watch-keeping engineer?
Ваш ответ правильный:
To inform the Chief Engineer of any situations that cannot be controlled during the watch.29
When a ships derrick or crane lifts a weight off the deck of a ship, from which position can the centre of gravity of the weight be considered to act?
Ваш ответ правильный:
From the head of the derrick or crane.30
A mechanical seal, consisting of carbon and ceramic seal rings, is to be fitted to a cetrifugal pump shaft. What is the most likely result of not being extremely careful when fitting this type of seal?
Правильный ответ:
The seal rings are brittle and can be easily chipped or damaged.Ваш ответ:
The seal rings are hard and may score the pump shaft.31
How would you report containers with dangerous goods lost overboard?
Ваш ответ правильный:
My vessel has lost containers with dangerous goods of IMDG Class ___ in position ___.32
How many buoyant smoke signals are carried in each lifeboat?
Ваш ответ правильный:
2.33
Which of these weapons are widely available and commonly used by criminals and terrorists to further their aims?
Ваш ответ правильный:
Gun.34
The packed gland on a centrifugal pump is leaking even though the gland has been “nipped up”. What is the correct action to take to stop the leakage?
Ваш ответ правильный:
Re-pack the stuffing box loosely with the correct size packing at the earliest opportunity.35
The end covers for a heat exchanger are held in place by a number of brass studs and nuts. Which of the tools given in the options is best suited for removal and tightening of the nuts?
Ваш ответ правильный:
Ring spanner or socket.36
What are class “C” bulkheads?
Ваш ответ правильный:
Bulkheads constructed of approved non-combustible materials but do not meet any of the requirements relative to smoke and flame nor limitations relative to temperature rise.37
The ring expander for removal and refitting of an air compressors piston rings is found to be broken and unusable. The work cannot be delayed until a replacement is obtained. Which of the methods given in the options should the ship’s engineers use to complete the work?
Ваш ответ правильный:
Fabricate a conical guide from tin plate or similar with the large diameter just bigger than the compressor piston so the rings can be eased open for fitting.38
What is the main reason for routine testing of the cooling water in a diesel engine cooling system?
Ваш ответ правильный:
To ensure that the correct levels of chemical treatment are maintained at all times.39
What will you serve seafarers who has been exposed to cold?
Ваш ответ правильный:
Warm nutritious drinks.40
Which electronic component does this graphical symbol represent?
Ваш ответ правильный:
Potentiometer, 10 kilo-ohms.41
With the set point at the actual desired value, a temperature control system is giving an unacceptably large offset (difference between set point and measured value) on high load resulting in a low system temperature. Which of the actions given in the options should be taken to reduce this effect and therefore achieve closer control of the temperature?
Ваш ответ правильный:
Reduce the width of the proportional band for the controller.42
Watch keeping engineers shall have a minimum of knowledge of the vessel’s engine room and operation of its functions prior to being accepted as Engineer on Duty, and shall acknowledge his familiarization with the equipment by signing a check list listing all units he shall be able to operate.
Ваш ответ правильный:
He shall have all the knowledge as listed in the other alternatives.43
Give the meaning of the symbol:
Ваш ответ правильный:
EPIRB.44
Chemical boiling out is one method that is used for cleaning the waterside of a steam boiler. Select from the given options the likely circumstances under which this procedure would be considered necessary?
Ваш ответ правильный:
Contamination of the boiler water by oil.45
When is a machine “securely guarded”?
Ваш ответ правильный:
When it is fitted with a guard or similar device which prevents foreseeable contact between a person, his clothing or items held in his hands, whilst it is in operation.46
A hand flare must have a burning period of at least:
Ваш ответ правильный:
1 min.47
Which ships does the ISM code apply to:
Ваш ответ правильный:
All passenger ships, all cargo ships of 500 GRT or above.48
Why are duplex filters usually employed in the lubricating oil system of an auxiliary diesel engine?
Ваш ответ правильный:
Changing of the filter element can be carried out without interrupting engine operation.49
During maintenance work on a main diesel engine the fuel injection valve is found to be jammed in the pocket in the cylinder cover. Which of the procedures given in the options should be followed in order to complete the work?
Ваш ответ правильный:
Replace the complete cylinder cover with a spare unit and land the cover with the jammed valve ashore for repair in a specialist workshop.50
A faint is a brief loss of consciousness of no more than momentary duration caused by a temporary reduction in the flow of blood to the brain.How to prevent anyone from fainting?
Правильный ответ:
Tell the person to sit down and lean forward with the head between the knees taking deep breaths.Ваш ответ:
Tell the person to sit down in a sitting position breathing normally.51
The Base Number of a lubricating oil is an indication of which of the following?
Ваш ответ правильный:
The alkalinity of the oil.52
High Voltage (HV) cables are smaller than low voltage cables for a given power rating. Why is this?
Ваш ответ правильный:
The HV cable carries a smaller current and therefore requires less copper.53
Why do some diesel engine manufacturers recommend machining the valve spindle sealing surface with a half degree difference to the valve seat angle?
Ваш ответ правильный:
To improve valve sealing by compensating for pressure and temperature effects on the valve during engine operation.54
Measuring instruments must be routinely calibrated. What is the meant by instrument calibration?
Ваш ответ правильный:
Comparing input and output values against a documented standard.55
A deadweight tester is used to check and calibrate a pressure gauge. The tester consists of a hydraulic pump and a hydraulic chamber and balance weight system. After completing the calibration of the pressure gauge the hydraulic pressure should be relieved before removing the weights. Select, from the options given, the main reason for this requirement.
Ваш ответ правильный:
To protect the piston in the hydraulic system from possible impact damage as it may reach the end of its stroke.56
What would be the most likely cause of a smell of “rotten eggs” in the upper casing of the engine room?
Ваш ответ правильный:
A leak of exhaust gas from a boiler or diesel engine exhaust.57
An electrical power emergency source in a ship is required because:
Ваш ответ правильный:
It satisfies the SOLAS (and other) requirements for ship safety.58
Which electronic component is this graphical symbol illustrating?
Ваш ответ правильный:
Zener diode.59
Which of the survival craft listed below is equipped with a buoyant line, not less than 50 m in length, of sufficient strength to tow a liferaft?
Ваш ответ правильный:
Rescue boat.60
Choose the option which is most likely to result in erosion of the tubes in a heat exchange:
Правильный ответ:
Cooling water velocity too high.Ваш ответ:
Cooling water temperature too high.61
An earth fault exists on the blue line of a 100 A bilge pump circuit. A second earth fault occurs on the yellow line of a 10 A ventilation fan circuit. Both systems are supplied from the ship’s 440 V supply. The likely outcome is that:
Ваш ответ правильный:
A short circuit occurs between earth faults and the ventilation fan fuse blows.62
Are there any restrictions about how much sludge we can pump overboard on the sea voyage?
Ваш ответ правильный:
Maximum is 30 litre per nautical mile and total is 1/30 000 part of full cargo on the ballast voyage.63
Consider a 450 volt, 859 kW rated generator has not been in operation for several weeks. Prior to starting, insulation resistance readings are taken. The minimum acceptable insulation resistance reading on the main stator winding to allow you to proceed with running the generator is:
Ваш ответ правильный:
1 000 000 Ohms.64
Why should engine and boiler rooms be kept clean and any oil spillage cleaned up immediately?
Ваш ответ правильный:
To reduce risk of fire and the risk of slipping.65
What does the term “Dead Ship” mean?
Ваш ответ правильный:
“Dead Ship” means that the machinery and boilers are inoperational due to lack of electrical power.66
Thermistors are temperature sensitive devices. A positive temperature coefficient thermistor will typically have:
Ваш ответ правильный:
Relatively non-linear characteristic.67
After water-washing the turbocharger exhaust side it starts to vibrate even though it was operating normally prior to the washing procedure. What is the most likely cause of this problem?
Ваш ответ правильный:
The rotor blades are damaged or the blades are not properly cleaned.68
The refrigeration system for the ships provisions consists of a number of cold rooms served by a central refrigeration system. The evaporator coils for the vegetable room are found to be frosting up even though the room is down to temperature and the liquid line valve has closed. Select, from the options given, the automatic control component which is likely to be malfunctioning and so cause this condition.
Ваш ответ правильный:
Back pressure control valve.69
What is the correct range for the pH-value for the water in an oil fired steam boiler?
Ваш ответ правильный:
9-11.70
When operating two centrifuges in series, in a purifier and clarifier arrangement, what is the purpose of the clarifier?
Ваш ответ правильный:
To improve the efficiency of solids removal.71
Generators must be synchronised before they can operate in parallel. During synchronising, the incoming generator should be running slightly “fast” compared to the bus bar frequency. This is to ensure that the:
Правильный ответ:
Incoming machine picks up as a generator.Ваш ответ:
Incomer picks up as a motor.72
When you join a new ship, how are you informed about safety rules, alarm instructions and your own duties in case of an emergency?
Правильный ответ:
By muster lists exhibited in conspicuous places.Ваш ответ:
By alarm instructions in all crew cabins.73
An air compressor is being refitted in the engine room. The compressor and motor are coupled using a flexible coupling and are mounted on a common “skid” which fixed to the deck with resilient mountings. Which of the statements, from the options given, relating to the alignment of the motor and compressor is true?
Правильный ответ:
Shims should be fitted between the motor and compressor feet and the skid to ensure correct vertical, horizontal and parallel alignment of the coupling halves before it is bolted up.Ваш ответ:
As long as the two coupling halves are at the same height the flexible coupling will accommodate any horizontal misalignment or difference in the gap between the coupling faces.74
The Ziegler-Nichols method is used in control engineering when setting up the system. Which of the system components given in the options would this method be applied to during initial set up?
Правильный ответ:
PID controller for tuning.Ваш ответ:
Valve positioner to optimise speed of operation.75
What action should be taken if the heat transfer capacity of a heat exchanger operating as a lubricating oil cooler is reducing?
Правильный ответ:
The heat transfer surfaces should be cleaned.Ваш ответ:
Decrease the lubricating oil flowrate.76
Feed check valves for the main and auxiliary boilers are normally of the double shut off type with one screw lift valve and one screw down non-return valve. What is the main function of the non-return valve?
Ваш ответ правильный:
To prevent the steam and water in the boiler from discharging out through the feed line if the feed line fractures or a joint in the line blows.77
From the statements given in the answer options, choose the one which is most accurate in relation to the operation of water-tube boiler and fire-tube boilers.
Правильный ответ:
Water-tube boilers are more efficient and generally contain less water than fire tube boilers. They are prone to major damage when run dry during operation.Ваш ответ:
A firetube boiler has a much better capability to work at higher steam pressure.78
Compressed air for instrument and control purposes needs to be of high quality. In order to condition the air filter modules are usually fitted to remove the contaminants. If there is evidence of oil carry over to the final elements in the instrumentation air system what is the most likely cause?
Ваш ответ правильный:
The coalescer module is saturated and requires renewal.79
What is an effective means of measuring the total dissolved solids in boiler water?
Правильный ответ:
Conductivity test.Ваш ответ:
Chloride test.80